condition mean min max 4 h after light 522.8 522.8 522.8 8 h after light 590.9 561.0 620.8 12 h after light 638.3 550.3 726.3 4 h after dark 472.25 345.4 599.1 8 h after dark 452.1 334.3 569.9 12 h after dark 381.3 309.1 453.5